package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Transactional//事务注解，要么全成功要么全失败
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size() >0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO){
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids){
        //判断当前菜品是否能删除————是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //当前菜品起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否能删除————是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        //删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //根据菜品id集合批量删除菜品数据
        //sql:delete from dish where id in(?,?,?)
        dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除关联的口味数据
        //sql:delete from dish_flavor where id in(?,?,?)
        dishFlavorMapper.deleteByDishIds(ids);
    }

//修改菜品 回显+修改
    /**
     * 根据id查询菜品和对应的口味数据 回显
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //先查菜品表获取一下数据
        Dish dish = dishMapper.getById(id);

        //根据dishId查询出口味
        //一个菜可能对应多个口味 用List来装
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //最后分别封装到DishVO里面
        DishVO dishVO = new DishVO();
        //先放dish的基础属性进去
        BeanUtils.copyProperties(dish, dishVO);
        //上面基础属性已经拷贝好了,接下来再放口味进去
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }
    /**
     * 根据id修改菜品基本信息和对应的口味信息 修改
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //更新修改 = 旧的口味全删了 再按照新传进来的重新插入即可
        //修改菜品表基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        //先删后插口味实现更新修改操作
        //删除
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入 = 修改 = 新增 从新增那边copy即可
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }
}
